diff --git a/lib/Pear/LocalLoop.pm b/lib/Pear/LocalLoop.pm
index c41371d..3576c48 100644
--- a/lib/Pear/LocalLoop.pm
+++ b/lib/Pear/LocalLoop.pm
@@ -50,7 +50,7 @@ sub startup {
             return $user->id;
         }
       }
-      return undef;
+      return;
     },
   });
 
diff --git a/lib/Pear/LocalLoop/Controller/Api/Auth.pm b/lib/Pear/LocalLoop/Controller/Api/Auth.pm
index d64bf09..41e3b1e 100644
--- a/lib/Pear/LocalLoop/Controller/Api/Auth.pm
+++ b/lib/Pear/LocalLoop/Controller/Api/Auth.pm
@@ -86,7 +86,7 @@ sub post_login {
       } elsif ( defined $user_result->organisation_id ) {
         $display_name = $user_result->organisation->name;
       } else {
-        return undef;
+        return;
       }
 
       return $c->render( json => {
diff --git a/lib/Pear/LocalLoop/Controller/Api/User.pm b/lib/Pear/LocalLoop/Controller/Api/User.pm
index 12ef04b..65f380c 100644
--- a/lib/Pear/LocalLoop/Controller/Api/User.pm
+++ b/lib/Pear/LocalLoop/Controller/Api/User.pm
@@ -72,7 +72,7 @@ sub post_account {
     } elsif ( defined $user_result->organisation_id ) {
       $display_name = $user_result->organisation->name;
     } else {
-      return undef;
+      return;
     }
 
     return $c->render( json => {